Very early KDE 6 release.

plasma/plasmoids/io.gitgud.wackyideas.win7showdesktop/contents/ui/lib/AppletVersion.qml

@@ -0,0 +1,50 @@
+import QtQuick 2.15
+import QtQuick.Controls 2.12
+import QtQuick.Layouts 1.3
+
+import org.kde.plasma.plasma5support as Plasma5Support
+import org.kde.plasma.plasmoid
+
+Item {
+	implicitWidth: label.implicitWidth
+	implicitHeight: label.implicitHeight
+
+	property string version: "?"
+	property string metadataFilepath: Plasmoid.file("", "../metadata.desktop")
+
+	Plasma5Support.DataSource {
+		id: executable
+		engine: "executable"
+		connectedSources: []
+		onNewData: {
+			var exitCode = data["exit code"]
+			var exitStatus = data["exit status"]
+			var stdout = data["stdout"]
+			var stderr = data["stderr"]
+			exited(exitCode, exitStatus, stdout, stderr)
+			disconnectSource(sourceName) // cmd finished
+		}
+		function exec(cmd) {
+			connectSource(cmd)
+		}
+		signal exited(int exitCode, int exitStatus, string stdout, string stderr)
+	}
+
+	Connections {
+		target: executable
+		function onExited() {
+			version = stdout.replace('\n', ' ').trim()
+		}
+	}
+
+	Label {
+		id: label
+		text: i18n("<b>Version:</b> %1", version)
+	}
+
+	Component.onCompleted: {
+		var cmd = 'kreadconfig6 --file "' + metadataFilepath + '" --group "Desktop Entry" --key "X-KDE-PluginInfo-Version"'
+		executable.exec(cmd)
+	}
+
+}